Fracture Toughness / Fracture Energy Data for Ceramics

NIST Standard Reference Database 138

Last Update to Data Content: 1998



Reference: NIST Structural Ceramics Database

Other material collections: Property Data Summaries

Other Toughness materials

NT-164 ( Si3N4 )

Material Summary:

                      [Ref. 1]                         
Manufacturer........: Norton/TRW          
Material Designation: NT-164  
Material Form.......: polycrystal     
Composition.........: Si3N4             
Processing..........: sintered and 
                      hot isostatically pressed


[1] G.A. Graves and N.L. Hecht, "Effects of Environment on the Mechanical Behavior of High-Performance Ceramics," Report No. UDR-TR-94-136, U.S. Department of Energy Contract DE-AC05-84R21400 (1995).

Property Table:

Temperature = 23 °C
Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
                         4.0                      ICS          air       Ref. 1; 3.1 g/cm3; E = 306 GPa;
                                                                                 H = 18.5 GPa